<mvc:interceptors>      
    <!-- 多个拦截器,顺序执行 -->      
    <mvc:interceptor>      
       <mvc:mapping path="/entryOrJsonController/*" /><!-- 如果不配置或/*,将拦截所有的Controller -->      
       <bean class="com.wy.interceptor.CommonInterceptor"></bean>      
    </mvc:interceptor>      
</mvc:interceptors>  

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class SpringMVCInterceptor implements HandlerInterceptor {


    /**
      *preHandle (HttpServletRequest request, HttpServletResponse response, Object handle) 方法，顾名思义，该方法将在请求处理之前进行调用
      /
    @Override
    public boolean preHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler) throws Exception {
        // TODO Auto-generated method stub
        return false;
    }

    /**
      *postHandle (HttpServletRequest request, HttpServletResponse response, Object handle, ModelAndView modelAndView) 方法，
      *由preHandle 方法的解释我们知道这个方法包括后面要说到的afterCompletion 方法都只能是在当前所属的Interceptor 的preHandle 方法的返回值为true 时才能被调用。
      /
    @Override
    public void postHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
        // TODO Auto-generated method stub

    }

    /**
      *afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handle, Exception ex) 方法，该方法也是需要当前对应的Interceptor 的preHandle 方法的返回值为true 时才会执行。
      *顾名思义，该方法将在整个请求结束之后，也就是在DispatcherServlet 渲染了对应的视图之后执行。这个方法的主要作用是用于进行资源清理工作的。
      /
    @Override
    public void afterCompletion(HttpServletRequest request,
            HttpServletResponse response, Object handler, Exception ex)
    throws Exception {
        // TODO Auto-generated method stub

    }

}